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XGN10
XGN10 Air Insulated Switchgear
The 10kV air-insulated ring main unit stands as a benchmark distribution equipment for medium-voltage distribution networks in China. It is widely compatible with 10kV voltage systems in urban power grids, industrial parks, and large-scale infrastructure projects. Utilizing dry and clean air as the insulating medium, it eliminates the use of SF6 greenhouse gas, balancing high insulation performance with environmental protection demands. The equipment integrates core components such as load switches and vacuum circuit breakers, offering comprehensive functionality including ring main power supply, sectional protection, and load transfer. With a modular structure and convenient expansion capabilities, it can not only meet the continuous power supply needs in densely populated areas but also accommodate the upgrading demands of distribution network automation transformation. It is currently the core selection equipment for medium-voltage distribution network construction in China.
Features
1. Strong universal adaptability:
It precisely matches the mainstream standards of domestic 10kV distribution networks, exhibits excellent compatibility with existing distribution network equipment, and can be integrated without additional modifications, adapting to both new construction projects and upgrades of old distribution networks.
2. Intelligent operation and maintenance upgrade:
Equipped with a built-in intelligent monitoring unit, it supports real-time collection of parameters such as switch status, insulation performance, temperature, and humidity. It can be seamlessly integrated into the distribution network automation platform, enabling remote control, fault location, and early warning. The operation and maintenance efficiency is improved by over 60%.
3. Balancing environmental protection and safety:
The air insulation design ensures no gas leakage and no greenhouse effect risk. The cabinet body is made of flame-retardant materials and features an anti-condensation structure, achieving a protection level of IP4X. It can withstand complex environments such as humidity and dust, significantly enhancing operational safety.
4. Controllable comprehensive cost:
Compared to SF6 ring main units, it eliminates the costs associated with gas procurement, recycling, and monitoring. Furthermore, with mature manufacturing processes and a well-established supply chain for components, the total lifecycle cost is reduced by 20% to 28% compared to similar products.
Applicable standards: GB/T 3906-2020, IEC 62271-201; Rated current: 1250A-2500A; Short-circuit breaking current: 25kA-31.5kA; Protection level: IP4X (IP55 for outdoor models); Installation methods: Indoor floor-mounted, outdoor prefabricated, cable trench embedded; Optional configurations: Smart metering terminal, fault recording module, electric energy storage operating mechanism.
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Specification
| No. | Name | Unit | Value |
| 1 | Rated Voltage | kV | 10 |
| 2 | Rated Frequency | Hz | 50 |
| 3 | Rated Current of Main Busbar / Maximum Rated Current of Fuse | A | 630, 125 |
| 4 | Rated Short-time Withstand Current of Main Circuit & Grounding Circuit | kA/S | 20, 3 |
| 5 | Rated Peak Withstand Current of Main Circuit & Grounding Circuit | kA | 50 |
| 6 | Rated Short-circuit Making Current of Main Circuit & Grounding Circuit | kA | 50 |
| 7 | Full Capacity Opening Times of Load Switch | times | 100 |
| 8 | Fuse Breaking Current | kA | 31.5 |
| 9 | Rated Closed-loop Breaking Current | A | 630 |
| 10 | Rated Transfer Current | A | 1600 |
| 11 | Mechanical Life | times | 2000 |
| 12 | 1min Power Frequency Withstand Voltage (Peak) – Phase-to-Phase & Phase-to-Earth / Isolation Break | kV | 28/32 |
| 13 | Lightning Impulse Withstand Voltage (Peak) – Phase-to-Phase & Phase-to-Earth / Isolation Break | kV | 75/85 |
| 14 | 1min Power Frequency Withstand Voltage of Secondary Circuit | kV | 2 |
| 15 | Protection Class | IP3X |
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FAQs
Is there a difference in the service life of 10kV air-insulated ring main units compared to SF6 type?
There is no significant difference. The core components are made of aging-resistant materials, and the sealing and insulation structures are optimized. The average service life is over 20 years, and the operation and maintenance costs are lower. The replacement cost in the later stage is much lower than that of SF6 equipment.
Can the equipment be adapted to meet the requirements of uninterrupted power distribution network operations?
Support. An optional bypass switch module can be equipped, which, in conjunction with insulated operation tools, enables live line maintenance and load transfer, significantly reducing the duration of power outages and meeting the high reliability requirements of urban distribution networks.
Related Applications
Urban distribution network trunk line: As the core control equipment of the urban 10kV distribution network trunk line, it can achieve multi-loop ring network interconnection and sectional protection. It is installed in small distribution rooms alongside urban roads and within green belts. Its intelligent functions can be integrated with the municipal distribution network automation system to quickly isolate fault sections and restore power supply to non-fault areas, ensuring continuous electricity supply for residents’ lives, commercial offices, and public facilities. It is suitable for urban high-density load and space-constrained scenarios.
Large commercial complexes: Places such as shopping centers and urban complexes have high load density and include critical loads such as elevators, central air conditioning, and emergency lighting. This equipment can serve as the core hub of the complex’s distribution network, enabling 10kV incoming line distribution and rapid fault handling. At the same time, it poses no SF6 gas hazards, meeting the safety and environmental protection requirements of commercial venues. Its modular design can accommodate the load growth needs of the complex’s future business expansion.
Upgrading of distribution network in industrial parks: Traditional industrial parks often face issues such as outdated distribution network equipment and insufficient power supply reliability. This equipment can replace old oil-immersed distribution equipment, establish a 10kV ring main unit (RMU) power supply system, and achieve segmented control and load transfer for various production lines within the park. The intelligent monitoring function enables park operation and maintenance personnel to grasp the distribution status in real time, reduce fault diagnosis time, and provide stable power support for efficient production in the park.
